Unlocking advice please

So I have a 3GS with 3.1.2 firmware on baseband 5.11.07 so I know it's unlockable. I jailbroke it with redsnow. It seems to me that the easiest way to unlock it would be with blackrain, but since I already jailbroke it with redsnow would it be safe to use blackrain? If blackrain won't help then what would be the best way to approach unlocking it?

Thanks a lot for that page and your help. I actually used iClassified when i jailbroke it. I just ran into another issue, I noticed that everytime I turn my phone off now that when I try to turn it on again it goes to that screen with the iTunes logo and then usb cable so I have to boot it tethered just to get the phone working. Do you have any idea what is causing this or how to fix it? Also is it safe to switch the sim cards while the phone is off? It looks to me like the unlock worked but I haven't tested another sim yet because of this issue.

Thanks a lot for that page and your help. I actually used iClassified when i jailbroke it. I just ran into another issue, I noticed that everytime I turn my phone off now that when I try to turn it on again it goes to that screen with the iTunes logo and then usb cable so I have to boot it tethered just to get the phone working. Do you have any idea what is causing this or how to fix it? Also is it safe to switch the sim cards while the phone is off? It looks to me like the unlock worked but I haven't tested another sim yet because of this issue.

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It sounds like you have a tethered jailbreak (read about tethered jailbreak all thru this site, but here is a thread for you to read).

I meant changing the sim while the phone is off but I changed it already. Its working on T-Mobile now. I know about the tethered jailbreak thing but what im wondering is why the phone goes to that usb cable screen when I try turning it on when the phone is off. I also noticed that the phone doesnt seem to want to use my homes wifi connection when the T-Mobile sim card is in. Any idea whats up with that?

Oh ok that makes sense, I hadn't looked at that link. I thought that the tethered meant that I just had to have it hooked up when jailbreaking and not everytime I turned the phone off, I hadn't even noticed it until a few days ago and my phone has been jailbroken for over a month. Thanks for the help guys. Everything is working good now.

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